Regulator



March-1, 1932, i J. M. LARSON 1,843,087

REGULATOR Filed April 14/1930 5 Sheets-Sheet 1 Jaw/2%? dyw a March 1, 1932; J. M. LARSON 1,848,087

REGULATOR Filed April 14, 1930 3 Sheets-Sheet 2 If IIII I [III/11111111, I 1 m I W III I Wm v I ,8

March 1, 1932. J. M. LARSON REGULATOR Filed April 14, 1930 1 P L 47 I L 1 3 Sheets-Sheet 3 draft pressure and controlling the uptake Patented Mar. 1, 1932 i if Jenni M, LAB-senor cnrcA'Go ILLmoIs, 'ASSIGNQR To NATIONAL raneunaronfcon PANY, or cnrc-Aeo, rumors, A oonronarron or rumors REGULAQOR Application filed April 14,

' I My invention relates to regulatorsrand provide a regulator ofthe'type which will have a graduated action, to provide a dust proof construction for the 1nvertedcup or hell, to provide anti-friction centermg means forthe bell, to provide, anfadjustablei and ali nable lever arrangement betweenthe bell ano. relay valve, to improve'variousfeatures of construction, to provide a simple block or relay valve in which the slightestmovement in either'direction will open the supply or eX- haust and in which one. port mustbeclosed beforetheoother can open,-and in which the sensitiveness is not changed by wea g'and to provide renewable elements for the valve construction.

Further objects scription and claims.

In the drawings, 1n whichian mbodiment of my invention is shown,-

Figure. l is a side elevational view showing improved regulator controlled by-Vthe damper of the furnace'fora ste'am'boiler; r

, Fig. 2 is a perspectiveview-showing; the power cylinderppilot or relay-valve and pressure-operated controller for the relayvalve;

and I i r Fig.- 3 is a vertical axlal seotionthrough the power cylinderand relay valve;

Refining 130 the drawings in detailfth f construction shown comprises a steam boiler and furnace 1, having anuptakedamper 2,

a powericylinder for controlling the position of the uptake damperQ, and mechanism controlled by the draftlpressure. (that is to say, the pressure above the firebed) for controlling the connection- 0f pressure and exhaust with thepowerfcylinder 3. In order to give a general idea of the operation, it is" here stated thatan increase in the draft pressure (thatis to say, an increase insuction) will set in action a train of forces, the final eifect of which is totend to close theuptake damper 2, thus tending to maintain a uniform balanced draft pressure. conversely adewillappear from the c by means of a vertical pipe 11 extending up crease of draft pressure (that is a st le a crease of suction) will tend to open the yuptake damper 2 and increase the draft suction In generah the control for the movement of the powercylinder 3 comprises a relay fsureis lowered, and, conversely'the valve mechanism being loweredrwhen the bell '5' is raised, The lower edge 6 of this bell or invertedcup 5lis immersed in a suitable liquid ,7, such v as oilcontainedin the annular chamber between the inner and'outer shells 8 and9, the interior of-the inverted cup being in communication: with the draft pressure through the conduitlO. I Theinteriorof-the bell is also incommunica-tion with a draft gaugewhich will indicate the draftpressure intoothe space inside the inner; shell 8 and a conduit 12 in-communicationwiththis vertical pipe 11. The provision'ofthe vertical" pipe '11 preventsthe entry of foreign substances, such as oil, dust and the like from I getting. into :the draft gauge tube {because a of the fact thattheentrance to this pipe is well aloovehthe bottom 13 of the chamber The. transmission from the bell 5 to the V relay valve mechanism comprises a leverlfi pivotally mounted on'a standard17 at 1 8 and a seco-ndlever l9 pivotally mounted on" Y s an adjustable bracket QO at QL-and-jpivotall);

connected-with'a spring rod 22 formed as an integral part ofthe valve stem 23'. In i order to facilitate the: aligmnent'of thetwo levers and lease {also the vertical adjustment withinthe inner-'shell8. A suitable liquid 5 valve constructionehavlng'valve mechamsm til of the levers, both of the levers are mounted so that they maybe swiveled to bring them into alignment and adjusted vertically to secure the proper relation. mind, the bracket or fulcrum member 17 on which the lever 16 is mounted is provided with a round standard 24 fitted in a split clamping sleeve 25 secured to the outer shell 9 so that the fulcrum 18 may be given aslight swiveling adjustment or may be adjusted vertically to secure the proper relation of parts. Similarly, the fulcrum member 26 on which the lever 19 is pivotally mounted is provided with a round post 27 fitting in a clamping sleeve 28 on the bracket 20 whereby this post 27 may be given a swiveling adjustment or an up and down adjustment, as desired. Furthermore, both levers 16 and 19 may be given an additional swiveling movement, since the bracket 20 which carries the fulcrum post 26 is an integral part of an annular bonnet member 29 threaded onto the bushing 30 forming a lower part of the valve casing 31 so that this bonnet 29 can be given a swiveling adjustment about the axis of the valve casing 31. Similarly, the entire float chamber 32 may be given a swiveling adj ustment about the vertical pipe 10 onto which the float chamber 32 is threaded so that by means of these various adjustments the proper height of the levers 16 and 19 and the proper relation with respect to each other may be secured.

In order to secure just the right counterbalancing effect for the float or bell 5, the lever 16 is provided with a screw extension 33 on which an adjustable weight 34 is mounted.

Coming now to a detailed description of the relay valve 4, which controls the connection of the cylinder 3 with the pressure and exhaust, this comprises a valve member 35 controlling the port'36 and thereby controlling the communication between the compressed air passage 37 and the passage 38 for the supply and exhaust for the cylinder 3 and a second valve member 39for con trolling communicationbetween the common inlet and exhaust passage 38 and the ex haust passage 40. The arrangement and con structi'on is such that on an upward movement of the valve stem 23 brought about by the action of the bell 5, the supply connection 37 will be open immediately after the ex haust connection 40 is closed and vice versa 011 the downward movement of the valve stem 23 the exhaust passage 40 will be opened immediately after the supply connection 37' is closed. This relation is brought about by having the upper supply valve 35 actuated .by the lower exhaust valve 39 on upward movement of the latter and by having a pas. sage 41 through the exhaust valve 39 which is closed the instant the upper end of the exhaust valve 39 comes in contact with the With this in 7 lower end 42 of the supply valve 35. Clearance passages 43 are provided about the downward extension of the supply valve 35 to permit compressed air to pass the instant the supply valve 35 is forced from its seat 44.

The exhaust valve 39 has a substantially fluid-tight fit in the sleeve portion 45 of the valve casing. The valve stem 23 has a pivotal connection with the exhaust valve 39 at 46. A suitable packing is provided in the lower end of the valve casing around the valve stem 23, comprising a pair of packing rings or washers 47 held in engagement with their seats by means of a coil compression spring 48 therebetween. It will be seen that this arrangement is such that the packing is exposed only to the exhaust pressure and never to the supply pressure and such also that the packing will be in effect a water seal because of the water of condensation haust through the passages 38, 41 and 40 and the power piston 49 will move upwardly under the action of the weights 50 and 51 so long as this exhaust connection is open. This will cause the uptake damper 2 to open wider resulting in an increased draft and an in creased suction in the hell 5 causing the bell to be lowered and the relay valve stem 23 to be raised. This upward movement of the valve stem 23 will in time cause the upper end of the exhaust valve 39 to engage the lower end 42 of the supply valve 35 closing the exhaust passage 41 through the exhaust valve 39 and preventing further upward movement of the power piston 49. Any further upward movement of the valve stem 23 will lift the supply valve 35 from its seat, thus admitting compressed air to the cylinder 3 above the piston 49 through the passages 43 and 38 and forcing the piston 49- down to cause a closing movement of the uptake damper 2. e

The counterweight 51 is just heavy enough to operate the uptake damper 2 properly and is made as light as practicable in order that opened to exhaust and it will be noted that the arrangement is such that this exhaust 50 does not have to be moved when the damper 2 is operated by hand. Suitable pulleys 53 are provided over which the flexible elements 54' run.

It will be seen that the construction shown will maintain the draft substantially constant and that it will give a graduated action t the damper. I

' While I have shown and described-but one embodiment of the present invention, it will be apparent to those skilled in the art that various modifications thereof may be made without departing from the spirit and scope of this invention, and, therefore, I Wish to be limited only by the scope of the prior art and the appended claims. 7 V

I cla1m: 1. A regulator construction comprising a liquid container, an open bottom container having its lower edge immersed in the liquid in the container and having its interior in communication with a source of variable pressure whereby said container is moved in accordance with variations of pressure, a power cylinder, a piston operating therein, a fluid pressure passage for supplying fluid for operating said piston, a fluid exhaust pas-- sage for said cylinder, and valve control means for controlling said supply and ex haust passages controlled by the pressurecontrolled movement of said container, and transmission between said container and valve means comprising a lever operated by said container, and a second lever actuated by V said'first lever for operating said valve means, one of said levers being adjustable about a vertical axis to assist in bringing the levers into proper relation.

2. A regulator construction comprising a .li uid container an 0 en bottom container having its lower edge immersed in the liquid in the contalner and having its interior in communcatlon with a source of variable pressure whereby said container is moved in ac' cordance with variationsof pressure, apower cylinder. a piston operating therein. a fluid pressure passage for supply fluid for operating said piston, a fluid exhaust passage for said cylinder, and valve control means for controlling said supply and exhaust passages 7 controlled by the pressure-controlled moveinder, and means for operating said valve,

ment of said container, and transmission between said contalner and valve means comrisinn' a lever 0 erated by said container and a second lever actuated by said first lever for operating said valve means, both of said levers being adjustable about vertical axes to assist in bringing them into proper relation. V

3. A regulator construction comprising a cylinder, a piston, and means for alternatively subjecting said piston to pressure and ex haust comprising a valve construction having a pressure chamber and an exhaust chamber, valve mechanism forcontrolling the communication between said chambers and cylmechanism to control both pressure and exhaust comprlsing a valve stem extending from the? exhaust chamber to the atmosphere and "a stuffing box surrounding said valve stem whereby thestufling box is subjected only to exhaustpressure, said stuffing box being below the exhaust chamber whereby if steam is used as the medium the water of condens'ation will flow down into the stufiing box to provide a water seal packing.

4. A regulator construction comprising a cylinder, a piston, and means for alternatively subjecting said piston to pressure and exhaust comprising a valve construction hav- 'ing a pressure chamber and an exhaust chamber, valve mechanism for controlling the commun1cat1on between sald" chambers and cyl- 'inder, and means for operating said valve nection atits lower portion with a source of I variable pressure, a bell or inverted cup forming a pressure chamber having its lower edge immersed in the liquid contained between the inner and outer shells, whereby said cup is moved in accordance with the variation in pressure, and a tubular member in communication with a draft gauge extending upward-V ly into the space within said inner shell to a point above the connection with the source of variable pressure whereby the draft gauge will be subjected to'the variable pressure and whereby foreign substances dropped into the space within the inner'shell will not readily Y find their way into the tube leading to the draft gauge. 7 c j 6. 'A regulator construction comprising a liquid container, an open bottom container having its loweredge immersed in the liquid in the container and having its interior in communicationwith a source of variable pressure whereby saidfcontainer is moved in accordance with variations in pressure, said liquid container having a removable imperferate cover and transmission from said openbottom container to mechanism to be controlled thereby comprising a lever extending through the side of said liquid container below the edge of said removable cover and hav-' ing an arm operating'in the space between the cover and open-bottom container.

In witness'wher'eof, l have "hereunto subscribed name.

ioo

r JonN'M; LARSON; f 

